"At this time, we believe the issue should be resolved," he added. "If you're missing achievements, please try signing out of Xbox LIVE, then sign back in. If this doesn't resolve your issue, then you will need to re-download your profile. Please note that this will remove any achievements you might have earned since the issue began, however, they can be re-earned."

_________________"Console A sucks! Console B is way better and never has problems! I don't know how to build a cheap PC that out performs both! Rabble rabble!!"

PootyPoo22 wrote:Gamerscore means nothing. I have never really worked so hard for an achievement that I would be upset if I lost my gamerscore

You clearly have not gotten the "Mile High Club" achievement from CoD 4. Hours and hours of trying to finally get it at around 2 in the morning, followed by breaking out from the sheer amount of frustration that it gave me.

Where gamerscore means nothing, individual achievements can be something that you can be proud of accomplishing.